BL-Heli 20A Brushless Speed Controller

Specifications

The Fingertech Mini BL-Heli 20A Speed controller is a replacement ESC for brushless weapon motors. It’s a one for one replacement for the controller in the Viper horizontal weapons add-on.  A very detailed video on ESCs and how they work can be seen on Youtube here: https://youtu.be/OZNxbxL7cdc

Our Fingertech Mini BL-Heli 20A Speed controller can serve in a variety of areas, but it should generally be viewed as a replacement part or a standalone weapons controller.

• Operates on BLHeli-S software
• Voltage: 11.1V – 14.8V
• Current: 20A continuous
• Size: 31 x 15 x 5.3mm (1.2 x 0.6 x 0.2in)
• With plastic case: 35.2 x 20.7 x 8.3mm (1.4 x 0.8 x 0.3in)
• Weight: 9.0grams (0.3oz)
• With case: 10.8grams (0.4oz)
• Motor wires: 3.5mm female bullet connectors, 70mm (2.75in) wire length.
• BLHeli-S firmware upgradable via signal wire (works with USB Linker for XM series)
• No on-board BEC.  Must provide 5V to radio receiver via other ESCs or separate dedicated BEC.

A great wiring diagram, thanks to Georgia Tech’s RoboJackets Wiki can be found here: Diagram

Note that the Fingertech Mini BL-Heli 20A Speed Controller would be used in this instance as the orange element in the wiring diagram:  as a controller to a brushless weapons motor.  All controllers are driven from the same battery, as you can see from the diagram.  This model doesn’t have a BEC (Battery Eliminator Circuit), which allows all elements to be run from a single battery.  Power to the receiver can be supplied by the motor ESCs or by a separate dedicated BEC circuit.

NOTE: This speed controller is forward only, and can be used to control weapons but NOT brushless drive motors.